Synonyms: Light Fast Rubine BL; Fast Wool Red BL; C.I. Acid Red 34; Metamine FastLight Red 4BL; C.I.17030; Acid Red 34;2-Naphthalenesulfonicacid, 6-amino-5-[2-(4-amino-2-sulfophenyl)diazenyl]-4-hydroxy-, sodium salt(1:2); Acid Ruby;1-Naphthol-3-sulfonicacid, 7-amino-8-(4-amino-2-sulfophenylazo)-, disodium salt (6CI); Amacid Fast Red BBL; Pontacyl Light Red 4BL;2-Naphthalenesulfonic acid, 6-amino-5-[(4-amino-2-sulfophenyl)azo]-4-hydroxy-,disodium salt (7CI,8CI,9CI);